Tape recording medium having both optical and magnetic recording layers

Abstract

Provided is a tape recording medium including: a base layer having a first surface and a second surface; a first recording layer disposed over the first surface of the base layer and capable of optically recording first data; an imprinted layer disposed between the base layer and the first recording layer; and a second recording layer. The second recording layer is disposed over the second surface of the base layer, contains a magnetic material, and has recorded second data different from the first data.

What is claimed is: 
     
       1. A tape recording medium comprising:
 a base layer having a first surface and a second surface; 
 a first recording layer disposed over the first surface of the base layer and capable of optically recording first data; 
 an imprinted layer disposed between the base layer and the first recording layer; and 
 a second recording layer disposed over the second surface of the base layer, containing a magnetic material, and having recorded second data different from the first data, the second data being information relating to a position of the first data to be recorded in the first recording layer along a longitudinal direction of the tape recording medium. 
 
     
     
       2. The tape recording medium according to  claim 1 , wherein
 the second data is information indicating a position along a track provided over the first recording layer. 
 
     
     
       3. The tape recording medium according to  claim 1 , wherein
 the imprinted layer is provided repeatedly with a predetermined tracking pattern. 
 
     
     
       4. An information recording/reproducing device for recording or reproducing first data in or from a tape recording medium having a first recording layer, a second recording layer, and an imprinted layer, the imprinted layer being provided repeatedly with a predetermined tracking pattern, the device comprising:
 an optical recording/reproducing unit configured to optically record or reproduce the first data in or from the first recording layer; 
 a magnetic recording/reproducing unit configured to magnetically record or reproduce second data in or from the second recording layer, the second data being different from the first data and being information relating to a position of the first data to be recorded in the first recording layer along a longitudinal direction of the tape recording medium; 
 a reel driving mechanism by which the tape recording medium is transported; and 
 a controller configured to calculate the second data from the position of the first data, and drive the reel driving mechanism using the predetermined tracking pattern and the second data as references. 
 
     
     
       5. A method of manufacturing a tape recording medium, the method comprising the steps of:
 forming a base layer having a first surface and a second surface; 
 forming an imprinted layer over the first surface of the base layer; 
 forming a first recording layer disposed over the imprinted layer and capable of optically recording first data; 
 forming a second recording layer disposed over the second surface of the base layer, the second recording layer containing a magnetic material; and 
 recording second data different from the first data in the second recording layer, the second data being information relating to a position of the first data to be recorded in the first recording layer along a longitudinal direction of the tape recording medium. 
 
     
     
       6. The method of manufacturing a tape recording medium according to  claim 5  further comprising the step of:
 forming a predetermined tracking pattern repeatedly over the imprinted layer.